Hello Sakyapanchen,
It seems like the issue is with some of the nodes in one of your widget blueprints. There are multiple warnings about some mismatched pins in your blueprints like this one:
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.04.02-14.31.08:397][ 0]LogBlueprint:Warning: [compiler ShowItemTypeWidget] Warning Can’t connect pins Widget Reference and Self : Show Item Type Widget Reference is not compatible with Self Reference.
Could you take a look at the nodes/pins these messages mention and see if you can fix those problems?